塔克拉玛干沙漠土壤沙化发生条件及对土壤性状影响

CENETIC CONDITIONS OF SOIL SANDIFICAION AND ITS IMPACTS ON SOIL CHARACTERISTICS IN THE TAKLIMAKAN DESERT

土壤沙化是土壤发育逆向演替恢复母质特性的过程，土壤沙化发生条件可以概括为４个方面：土壤干旱是沙化的根本条件、植被衰败为风沙活动创造了条件、土壤质地轻是沙化物质基础、大风和频繁起沙风是沙化的动力条件。土壤沙化结果使土壤粗粒化、贫瘠化，同时也使土壤含盐量降低。

Soil sandification refers to the process that non-aeolian sandy soils degraded into aeoliansandy soils in arid area. Genetic conditions of soil sandification may be summarized into four aspectsas follows: First, soil drought is the key factor of soil sandification F Second, vegetation degradationreduces the sand-control and check-wind capacities; Third, light texture of soil forms the material basis of soil sandification; Fourth, gale and winds which blow out samd grains are the dynamic factorof soil sandification. Soil sandification makes grain size coarse, soil fertility poor, and total saltcontent reductive.